.bgpicc{background:url(water01.jpg) no-repeat center fixed;background-size:contain}
.bgtest{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url(water01.jpg) no-repeat;
    background-size: cover;
    z-index: -1;
}

